Claude 3.7 Sonnet Reasoning vs Gemini 2.5 Pro Turbo: which model should you choose?
We compared Claude 3.7 Sonnet Reasoning and Gemini 2.5 Pro Turbo on price, context window and 12 benchmarks. Gemini 2.5 Pro Turbo has the stronger average benchmark score; Gemini 2.5 Pro Turbo is cheaper on a blended 3:1 basis.
Claude 3.7 Sonnet Reasoning
Claude 3.7 Sonnet Reasoning is a frontier model from Anthropic. It offers a 128,000-token context window, costs $16.30 per million input tokens and $77.62 per million output tokens, and averages 83.7 across the index's benchmark suite.
- Input
- $16.30 / 1M
- Output
- $77.62 / 1M
- Context
- 128,000
- Avg score
- 83.7
- Open weights
- No
Gemini 2.5 Pro Turbo
Gemini 2.5 Pro Turbo is a frontier model from Google DeepMind. It offers a 1,000,000-token context window, costs $16.32 per million input tokens and $72.61 per million output tokens, and averages 83.9 across the index's benchmark suite.
- Input
- $16.32 / 1M
- Output
- $72.61 / 1M
- Context
- 1,000,000
- Avg score
- 83.9
- Open weights
- No
Specification comparison
| Spec | Claude 3.7 Sonnet Reasoning | Gemini 2.5 Pro Turbo | Edge |
|---|---|---|---|
| Input price / 1M | $16.30 | $16.32 | A |
| Output price / 1M | $77.62 | $72.61 | B |
| Context window | 128,000 | 1,000,000 | B |
| Max output | 128,000 | 128,000 | Tie |
| Average score | 83.7 | 83.9 | B |
| Arena Elo | 1464.4 | 1464.0 | A |
| Open weights | No | No | Tie |
Benchmark comparison
Claude 3.7 Sonnet Reasoning wins 5, Gemini 2.5 Pro Turbo wins 7, and 0 benchmarks are tied. The table shows the modelled score for each model and the gap.
| Benchmark | Claude 3.7 Sonnet Reasoning | Gemini 2.5 Pro Turbo | Gap | Winner |
|---|---|---|---|---|
| MMLU-Pro | 86.4 | 82.9 | 3.5 | Claude 3.7 Sonnet Reasoning |
| GPQA Diamond | 81.3 | 81.7 | 0.4 | Gemini 2.5 Pro Turbo |
| SWE-bench Verified | 71.0 | 71.4 | 0.4 | Gemini 2.5 Pro Turbo |
| HumanEval | 89.2 | 88.1 | 1.1 | Claude 3.7 Sonnet Reasoning |
| MATH-500 | 90.3 | 90.6 | 0.3 | Gemini 2.5 Pro Turbo |
| AIME 2025 | 79.8 | 83.7 | 3.9 | Gemini 2.5 Pro Turbo |
| LiveCodeBench | 79.6 | 78.6 | 1.0 | Claude 3.7 Sonnet Reasoning |
| IFEval | 90.1 | 90.7 | 0.6 | Gemini 2.5 Pro Turbo |
| TruthfulQA | 86.2 | 85.9 | 0.3 | Claude 3.7 Sonnet Reasoning |
| HellaSwag | 90.4 | 91.2 | 0.8 | Gemini 2.5 Pro Turbo |
| MMMU | 76.5 | 78.4 | 1.9 | Gemini 2.5 Pro Turbo |
| Arena Elo | 1464.4 | 1464.0 | 0.4 | Claude 3.7 Sonnet Reasoning |
Price analysis
On a blended 3:1 input-to-output basis, Claude 3.7 Sonnet Reasoning costs about $31.63 per million tokens and Gemini 2.5 Pro Turbo costs about $30.39. Gemini 2.5 Pro Turbo is roughly 4% cheaper than Claude 3.7 Sonnet Reasoning. At high volume, that gap compounds quickly, so price should carry real weight unless the quality difference is decisive.
Gemini 2.5 Pro Turbo has the larger context window at 1,000,000 tokens, compared with 128,000 for Claude 3.7 Sonnet Reasoning. That matters for long documents, large codebases and multi-step agent traces.
Verdict
Across 12 shared benchmarks, Claude 3.7 Sonnet Reasoning wins 5, Gemini 2.5 Pro Turbo wins 7, and 0 are tied. On the index average, Gemini 2.5 Pro Turbo leads Claude 3.7 Sonnet Reasoning by 0.2 points (83.9 versus 83.7).
The price picture favours Gemini 2.5 Pro Turbo. The context picture favours Gemini 2.5 Pro Turbo. Those two dimensions often matter more than a few benchmark points once a model is good enough for the task.
If you need a single default, start with Gemini 2.5 Pro Turbo for quality-sensitive work, and check whether its price holds at your expected volume before committing.
Choose Claude 3.7 Sonnet Reasoning if
- You prefer Anthropic's tooling or already use it.
Choose Gemini 2.5 Pro Turbo if
- You want the higher average benchmark score in this index.
- Unit cost matters and you want the cheaper blended price.
- You need the larger 1,000,000-token context window.
FAQ
Is Claude 3.7 Sonnet Reasoning better than Gemini 2.5 Pro Turbo?
On the index average, Gemini 2.5 Pro Turbo leads Claude 3.7 Sonnet Reasoning by 0.2 points (83.9 versus 83.7). The better choice depends on price, context and your task. Claude 3.7 Sonnet Reasoning wins 5 benchmarks, Gemini 2.5 Pro Turbo wins 7.
Which is cheaper, Claude 3.7 Sonnet Reasoning or Gemini 2.5 Pro Turbo?
Gemini 2.5 Pro Turbo is cheaper on a blended 3:1 basis at about $30.39 per million tokens, versus $31.63 for Claude 3.7 Sonnet Reasoning.
Which has the larger context window?
Gemini 2.5 Pro Turbo has the larger context window at 1,000,000 tokens. Claude 3.7 Sonnet Reasoning has 128,000 tokens.
Are these models open weights?
Claude 3.7 Sonnet Reasoning is proprietary; Gemini 2.5 Pro Turbo is proprietary.
Which should I choose for production?
If you need a single default, start with Gemini 2.5 Pro Turbo for quality-sensitive work, and check whether its price holds at your expected volume before committing.